1964. 2011-06-14T20:36:46Z. 2012-02-13T19:48:28Z. Stager, Harold Keith, 1921-. U.S. Geological Survey. English. Public. Kentucky, Laurel County, Clay County, and Knox County.
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1964. 2011-06-15T19:57:00Z. 2021-08-20T21:33:34Z. Spencer, Frank Darwyn, 1904-. U.S. Geological Survey. English. Public. Kentucky, Boyd County, and Lawrence County.
1964. 2011-06-07T20:09:37Z. 2012-02-14T23:37:40Z. Taylor, Alfred R. U.S. Geological Survey. English. Public. Kentucky, Adair County, Cumberland County, and Metcalfe County.
1964. 2011-06-20T15:18:47Z. 2011-06-20T15:18:47Z. Lambert, T. William, 1929-. U.S. Geological Survey. English. Public. Kentucky, Marshall County, and Livingston County.
1964. 2011-06-02T14:07:44Z. 2012-02-14T00:29:25Z. Roberts, Albert Eugene, 1921-. The Survey. English. Public. Montana and Park County.
1964. 2011-06-15T20:12:22Z. 2012-02-14T00:30:23Z. Denny, Charles Storrow, 1911-. U.S. Geological Survey. English. Public. Kentucky, Greenup County, and Lewis County.
1964. 2011-12-08T19:53:06Z. 2022-03-29T21:35:14Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky, Adair County, and Taylor County.
1964. 2011-06-07T19:32:56Z. 2012-02-13T19:47:55Z. Fox, Kenneth F. The Survey. English. Public. Kentucky and Trigg County.
1964. 2011-06-07T15:06:03Z. 2020-10-16T19:17:55Z. Sims, P. K. (Paul Kibler), 1918-2011. The Survey. English. Public. Colorado and Gilpin County.
1964. 2011-06-02T14:14:18Z. 2012-02-14T00:29:25Z. Roberts, Albert Eugene, 1921-. Geological Survey. English. Public. Montana and Park County.